ILLUSTRATIONS N . xv 



FIO. PAGE 



97. Experimentally produced placenta of pseudo-pregnant rabbit - - 375 



98. Part of an early human chorionic villus - 397 



99. Early blastocyst of rabbit - ... 495 



100. Formation of the amnion in the rabbit - - 413 



101. Foetal membranes of horse - - 413 



102. Diagram to illustrate the three parts of the wall of the yolk-sac (rabbit) 416 



103. Diagram of an opossum embryo and its appendages - 417 



104. Diagram showing the arrangement of foetal membranes in Dasyurus - 418 



105. Diagram showing the arrangement of foetal mem branes in Peramehs - 419 



106. Elongated blastocyst of sheep at thirteenth day of pregnancy - - 420 



107. Transverse section through blastocyst of sheep at twenty-fifth day - 421 



108. Blastodermic vesicle of rabbit - 422 



109. Diagram of blastodermic vesicle of rabbit in longitudinal section - - 423 



1 10. Diagram to illustrate foetal membranes of JSrinaceus - 425 



111. Hypothetical section of human ovum embedded in decidua - 426 



112. Portion of injected chorion of pig - - 427 



113. Section through wall of uterus and blastocyst of pig at twentieth day 



of pregnancy - 428 



114. Diagram representing a stage in the formation of the placenta (pig) - 429 



115. Section through uterine and embryonic parts of a cotyledon of sheep 



at twentieth day of pregnancy - - 430 



116. Section through base of foetal villus, etc. (sheep) - - 431 



117. Columnar trophoblast-cells from the base of foetal villus at third month 



of pregnancy (cow) to show phagocytosis - 433 



118. Histology of the placenta in the cow and sheep - 435 



119. First stage of cellular secretion in placenta of cow - 437 



120. Ingestion and disintegration of red blood corpuscles by trophoblast of 



sheep - 439 



121. Absorption of " Stabchen " by trophoblast of sheep - 441 



122. The uterine mucosa of dog at about twenty -third day of pregnancy 443 



123. Ovum with zonary band of villi - - 445 



124. The angioplasmode of dog at thirtieth day of pregnancy - - 446 



125. The labyrinth and green border of placenta of dog at fortieth day of 



pregnancy - 447 



126. Transverse section of a four days' gestation sac of rabbit - - 451 



127. Transverse section of a seven days' gestation sac of rabbit - 452 



128. Section through uterine mucosa of rabbit pregnant about eighteen days - 453 



129. Thickened ectoderm in rabbit, attached to placental lobe - - 454 



130. Iron granules in placenta of rabbit at eighteenth day of pregnancy - 459 



131. Glycogenic areas of rabbit's placenta at twelfth day of pregnancy - 461 



132. Inversion of germinal layers in blastodermic vesicle of mouse - - 468 



133. Longitudinal section of implantation cavity of field-mouse about eighth 



day of pregnancy - - 469 



134. Longitudinal section of uterus and implantation cavity of guinea-pig - 472 



135. Blastodermic vesicle of guinea-pig, showing inversion of germinal layers 473 



136. Implantation cavity of guinea-pig - 474 



137. Implantation cavity of guinea-pig - - 475 



138. Allantoidean diplo-trophoblast of Erinaceu* ~~ - 477 



139. Section in situ of ovum of Eriiiaceus - 478 



140. The extension of yolk-sac against lacunar trophoblast in Erinaceus 479 



141. Transverse section through uterus of Sorex at a stage when the blasto- 



cysts are still in the oviducts - - 480 



142. Part of the anti-mesometrial wall of the uterus of Sorex - - 482 



143. Uterus and embryo of Sorex - 483 



144. Orifice of uterine gland of mole with trophoblastic dome - - 485 



145. Replacement of omphaloidean by allantoidean placenta - 486 



146. Placenta of bat - - - - - - - - 488 



